. >>> for now federal officials have decided not to read tsarnaev his miranda rights. miranda rights inform criminals of their right to remain silent and their right to an attorney. this is allowed on a limited basis when the public may be in immediate danger, and there are those like senator lindsey graham who say tsarnaev should be consideredn enemy combatant so he can waive his right. others disagree. >> there's plenty of evidence. they don't need it to get him into a trial. i don't think we have to cross the line and say he's an enemy combatant which could be challenged in court. one circuit rules one way, one rules the other way. >> we should reserve the right to look at him as an enemy combatant and continue to look for evidence and if we find evidence and go to him as chuck says and gather intelligence. >> now the suspect's mother says tamer lan was contacted by fbi. the fbi says that is not true but the fbi did interview him in 2011 at the request of the russian government. officials are focusing on a trip he made to russia in 2012. sky news's katie stallard ha